src/video/texture_manager.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux
   4 //  Copyright (C) 2006 Matthias Braun <matze@braunis.de>
   5 //
   6 //  This program is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU General Public License
   8 //  as published by the Free Software Foundation; either version 2
   9 //  of the License, or (at your option) any later version.
  10 //
  11 //  This program is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //  GNU General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU General Public License
  17 //  along with this program; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20 #include <config.h>
  21
  22 #include "texture_manager.hpp"
  23
  24 #include <assert.h>
  25 #include <SDL.h>
  26 #include <SDL_image.h>
  27 #include <GL/gl.h>
  28 #include <GL/glext.h>
  29 #include <iostream>
  30 #include <sstream>
  31 #include <stdexcept>
  32 #include "physfs/physfs_sdl.hpp"
  33 #include "image_texture.hpp"
  34 #include "glutil.hpp"
  35 #include "file_system.hpp"
  36 #include "log.hpp"
  37
  38 TextureManager* texture_manager = NULL;
  39
  40 TextureManager::TextureManager()
  41 {
  42 }
  43
  44 TextureManager::~TextureManager()
  45 {
  46   for(ImageTextures::iterator i = image_textures.begin();
  47       i != image_textures.end(); ++i) {
  48     if(i->second == NULL)
  49       continue;
  50     log_warning << "Texture '" << i->first << "' not freed" << std::endl;
  51     delete i->second;
  52   }
  53 }
  54
  55 ImageTexture*
  56 TextureManager::get(const std::string& _filename)
  57 {
  58   std::string filename = FileSystem::normalize(_filename);
  59   ImageTextures::iterator i = image_textures.find(filename);
  60
  61   ImageTexture* texture = NULL;
  62   if(i != image_textures.end())
  63     texture = i->second;
  64
  65   if(texture == NULL) {
  66     texture = create_image_texture(filename);
  67     image_textures[filename] = texture;
  68   }
  69
  70   return texture;
  71 }
  72
  73 void
  74 TextureManager::release(ImageTexture* texture)
  75 {
  76   image_textures.erase(texture->filename);
  77   delete texture;
  78 }
  79
  80 void
  81 TextureManager::register_texture(Texture* texture)
  82 {
  83   textures.insert(texture);
  84 }
  85
  86 void
  87 TextureManager::remove_texture(Texture* texture)
  88 {
  89   textures.erase(texture);
  90 }
  91
  92 static inline int next_power_of_two(int val)
  93 {
  94   int result = 1;
  95   while(result < val)
  96     result *= 2;
  97   return result;
  98 }
  99
 100 ImageTexture*
 101 TextureManager::create_image_texture(const std::string& filename)
 102 {
 103   SDL_Surface* image = IMG_Load_RW(get_physfs_SDLRWops(filename), 1);
 104   if(image == NULL) {
 105     std::ostringstream msg;
 106     msg << "Couldn't load image '" << filename << "' :" << SDL_GetError();
 107     throw std::runtime_error(msg.str());
 108   }
 109
 110   int texture_w = next_power_of_two(image->w);
 111   int texture_h = next_power_of_two(image->h);
 112
 113 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
 114   SDL_Surface* convert = SDL_CreateRGBSurface(SDL_SWSURFACE,
 115       texture_w, texture_h, 32,
 116       0xff000000, 0x00ff0000, 0x0000ff00, 0x000000ff);
 117 #else
 118   SDL_Surface* convert = SDL_CreateRGBSurface(SDL_SWSURFACE,
 119       texture_w, texture_h, 32,
 120       0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
 121 #endif
 122
 123   if(convert == 0)
 124     throw std::runtime_error("Couldn't create texture: out of memory");
 125
 126   SDL_SetAlpha(image, 0, 0);
 127   SDL_BlitSurface(image, 0, convert, 0);
 128
 129   ImageTexture* result = NULL;
 130   try {
 131     result = new ImageTexture(convert);
 132     result->filename = filename;
 133     result->image_width = image->w;
 134     result->image_height = image->h;
 135   } catch(...) {
 136     delete result;
 137     SDL_FreeSurface(convert);
 138     throw;
 139   }
 140
 141   SDL_FreeSurface(convert);
 142   return result;
 143 }
 144
 145 void
 146 TextureManager::save_textures()
 147 {
 148   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 149   glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
 150   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 151   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
 152   glPixelStorei(GL_PACK_SKIP_IMAGES, 0);
 153   glPixelStorei(GL_PACK_ALIGNMENT, 1);
 154   for(Textures::iterator i = textures.begin(); i != textures.end(); ++i) {
 155     save_texture(*i);
 156   }
 157   for(ImageTextures::iterator i = image_textures.begin();
 158       i != image_textures.end(); ++i) {
 159     save_texture(i->second);
 160   }
 161 }
 162
 163 void
 164 TextureManager::save_texture(Texture* texture)
 165 {
 166   SavedTexture saved_texture;
 167   saved_texture.texture = texture;
 168   glBindTexture(GL_TEXTURE_2D, texture->get_handle());
 169   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH,
 170                            &saved_texture.width);
 171   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT,
 172                            &saved_texture.height);
 173   glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER,
 174                            &saved_texture.border);
 175   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 176                       &saved_texture.min_filter);
 177   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 178                       &saved_texture.mag_filter);
 179   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 180                       &saved_texture.wrap_s);
 181   glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 182                       &saved_texture.wrap_t);
 183
 184   size_t pixelssize = saved_texture.width * saved_texture.height * 4;
 185   saved_texture.pixels = new char[pixelssize];
 186
 187   glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 188                 saved_texture.pixels);
 189
 190   saved_textures.push_back(saved_texture);
 191
 192   glDeleteTextures(1, &(texture->handle));
 193   texture->handle = 0;
 194
 195   assert_gl("retrieving texture for save");
 196 }
 197
 198 void
 199 TextureManager::reload_textures()
 200 {
 201   glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 202   glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
 203   glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
 204   glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
 205   glPixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
 206   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 207
 208   for(std::vector<SavedTexture>::iterator i = saved_textures.begin();
 209       i != saved_textures.end(); ++i) {
 210     SavedTexture& saved_texture = *i;
 211
 212     GLuint handle;
 213     glGenTextures(1, &handle);
 214     assert_gl("creating texture handle");
 215
 216     glBindTexture(GL_TEXTURE_2D, handle);
 217     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
 218                  saved_texture.width, saved_texture.height,
 219                  saved_texture.border, GL_RGBA,
 220                  GL_UNSIGNED_BYTE, saved_texture.pixels);
 221     delete[] saved_texture.pixels;
 222     assert_gl("uploading texture pixel data");
 223
 224     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 225                     saved_texture.min_filter);
 226     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
 227                     saved_texture.mag_filter);
 228     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
 229                     saved_texture.wrap_s);
 230     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
 231                     saved_texture.wrap_t);
 232
 233     assert_gl("setting texture_params");
 234     saved_texture.texture->handle = handle;
 235   }
 236
 237   saved_textures.clear();
 238 }